A Study on the Pore and Strength Characteristics of an Eco-Friendly Sprayed Ultra High Performance Concrete with Manufactured Sand
文献类型：期刊论文
| 作者 | Wang, Zhonghao1,2; Tan, Xianjun1; Yuan, Jingqiang1; Wang, Chongge2; Liu, Yubiao1 |
| 刊名 | APPLIED SCIENCES-BASEL
 |
| 出版日期 | 2025-03-30 |
| 卷号 | 15期号:7页码:14 |
| 关键词 | sprayed UHPC mechanical properties pore distribution microstructure |
| DOI | 10.3390/app15073776 |
| 英文摘要 | Conventional shotcrete systems face critical limitations in adverse geological environments, including a delayed strength development (<5 MPa at 3 h), excessive rebounds (15-25%), and permeable macropore networks (>50 mu m), often resulting in support failure for deeply buried tunnels. To address these challenges, this study systematically investigates the mechanical properties and pore characteristics of a manufactured sand-based sprayed UHPC at different spraying positions under simulated tunnel conditions. Our results demonstrate that the high-pressure air (0.8 MPa) driven spraying process optimizes its pore distribution, reducing large pores (>10 mu m) and increasing harmless pores (<100 nm). Furthermore, the sprayed UHPC incorporating manufactured sand derived from tunnel slag not only maintains a 28-day compressive strength of 110.9 MPa but also reduces material costs and enhances sustainability. Field tests validate its low rebound rate (<5%) and rapid strength development (achieving a compressive strength of 30 MPa within 1 day), confirming its adaptability to complex geological conditions such as high-stress zones, thereby providing a novel method for support in complex geological conditions. |
| 资助项目 | National Natural Science Foundation of China ; Science and Technology Planning Project of Xizang Autonomous Region, China[XZ202201ZY0021G] ; Science and Technology Planning Project of Xizang Autonomous Region, China[XZ202401ZY0085] ; Youth Innovation Promotion Association CAS ; [52279119] ; [42293355] ; [51991392] |
| WOS研究方向 | Chemistry ; Engineering ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001464848500001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36356]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Tan, Xianjun |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Shandong Univ Sci & Technol, Coll Civil Engn & Architecture, Qingdao 266590, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Zhonghao,Tan, Xianjun,Yuan, Jingqiang,et al. A Study on the Pore and Strength Characteristics of an Eco-Friendly Sprayed Ultra High Performance Concrete with Manufactured Sand[J]. APPLIED SCIENCES-BASEL,2025,15(7):14. |
| APA | Wang, Zhonghao,Tan, Xianjun,Yuan, Jingqiang,Wang, Chongge,&Liu, Yubiao.(2025).A Study on the Pore and Strength Characteristics of an Eco-Friendly Sprayed Ultra High Performance Concrete with Manufactured Sand.APPLIED SCIENCES-BASEL,15(7),14. |
| MLA | Wang, Zhonghao,et al."A Study on the Pore and Strength Characteristics of an Eco-Friendly Sprayed Ultra High Performance Concrete with Manufactured Sand".APPLIED SCIENCES-BASEL 15.7(2025):14. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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